Container and method of making same



I Aug. 1935. v C BR Q O KS 2,010,912 CONTKII H BR AND IETHOD OF MAKINGSAME mad Jui 18,1931

NNNNNN OR .disadvantages either by reason of UNITED STATESPAT-ENTHOFFICE CONTAINER. AND METHOD OF MAKING SAME Lewis G. Brooks,Milwaukee, Wis., assig'nor, by

mesne assignments, to Sutherland Paper Company, Kalamazoo, MichiganMich,

a corporation of Application July 18, 1931, Serial No. 551,601

6 Claims.

This invention relates broadly to containers and method of making same,and more particularly to the provision of containers having tightclosures such as will enable the handling of liq- .uids therein withoutsubstantial danger of leakage between the body of the container and thecover. The invention still more particularly relates to the art ofmaking fibrous containers having special provision for effecting aliquidtight seal between the body of the container and the cover.

Various provisions have heretofore been proposed for effectingliquid-tightclosure of containers without hermetically sealing the same.Among the various types of containers adapted and used extensively forpurveying liquids are containers of the fibrous type made out of one ormore plies ofheavy paper or fibrous-material.

It is customary to utilize what is known as a slip cover on fibrouscontainers to make "the same as nearly liquid-tight as possible. A slipcover, generally speaking, is a cover which fits either into or aboutthe mouth of the container body; tightly enough to bemaintained firmlyin place by friction and to prevent substantial leakage between thecontainer body and cover.

In other types of containers, such, for example, as those made out ofthin sheet metal, it has heretofore been customary to-hermetically sealthe container body and cover together or to utilize a screw cap usualtype. All of the provisions above mentioned are open to various poorsealing efficiency, excessive cost, or both.

One of the objects of the present invention is to provide a containerhaving provjsionfor tightly sealing ,i' he body of the container andcover together, win 1; enables thg obtaining of better sealing efiic cythan a slip 'cover and is less expensive and cumbersome than ahermetically sealed container or one utilizing a screw top. Theinvention is well adapted for utilization in the manufacture ofcontainers made out of various materials such as fibrous material, thinsheet metal, etc., although it has particular ad vantages when appliedto the manufacture of fibrous containers. In the description of apresent preferred embodiment of the invention to follow a container ofthe fibrous type has been used as an example andit is of course to beunderstood that the invention is in no sense restricted to the art ofmaking fibrouscontainers.

I"provide a container comprising interfitting members adapted to form ajoint, a sealing surface of one of such members having an outstandingportion extending generally toward a sealing surface of the other, thecooperating sealing surface of the latter being relatively smooth. Ifurther provide a container comprisinga body and a slip cover therefor,a sealing surface of one together and pressed together as shown.

(on. easy-5.5)

comprising providing a containermember, forming adjacent the mouth ofsuch member an 'outstanding sealing portion, and providing a cooperatingcontainer member having a relatively smooth sealing portion adapted tolie against the outstanding sealing portion of the first mentionedmember to assist in effectively sealin'g such members together.

Other objects and advantages of the invention 'will become apparent asthe following description of a present preferred embodiment thereofproceeds.

In the accompanying drawing I have shown a present preferred embodimentof the invention, in which Figure 1 is a perspective view of a fibrouscontainer having the cover removed; and

Figure 2 is an elevational view of the container shown in Figure l butwith the cover in place and partly' in vertical central cross-section.

. Referring more particularly to the drawing, there is provided acontainer body 2 and a cover 3. Both the body and cover may be formed ofordinary fibrous material spirally wound and cut into lengths and havingend closures applied as wellknown in the art. A typical connectionbetween the cover disc 4 and the body of the cover is shown at 5, theextremity of the cover body and .the outer portion of the disc beingturned The bottom closure of the container body may be applied in asimilar manner.

Preferablythe internal diameter of the cover is only veryslightlygreater than the external diameter of the body so that normally thecover would be of the type known as a slip cover and would be adapted tobe pushed'down over the mouth of the container body and maintained inplace thereon by friction. i

I prefer, however, to form on the sealing surface of either thecontainer body or the cover one or more outstanding portions, preferablyslightly resilient, adapted to cooperate with a,

relatively smooth sealing surface of the other to assist in efiectivelysealing the joint between the container body" and cover. In the presentpreferred embodiment of the invention shown for purposes of illustrationin the drawing, the container body is provided with a series ofoutwardly pressed or embossed parallel rings 6. Such rings arepreferably formed after the tube has been wound and either before orafter the bottom closure has been applied. They may be formed by anordinary embossing die.

The rings-6 extend outwardly beyond the outer down over the mouth of thecontainer and over the outstanding rings, somewhat compressing suchrings inwardly whereby to produce a tighter and'more eficient seal thancan be produced simply by a plain container provided with a plain slipcover. The axially spaced rings 6 tend to very slightly deform the innerportion of the cover and increase the pressure between the containerbody and cover so that direct pressure rather than static friction aloneis brought to bear between the container body and the cover. Thus, astronger closure and more effective seal is obtained than with a simpleslip cover which relies substantially entirely upon static frictionrather than pressure to maintain the seal.

The outstanding sealing or compression portion or portions may takevarious forms, although preferably extending substantially peripherallyof the container. For example, instead of one or more sealing rings acontinuous screw thread may be used, although a series of generallyparallel rings is at present preferred, as such a provision givesexcellent results. Such sealing means may be applied either to thecontainer body or to the cover; if applied to the cover the body ispreferably left substantially smooth so that practically the same resultis accomplished. Substantially the same provision may easily be appliedto containers made of thin sheet metal or, in fact, to any containersmade of a material having an appreciable resilience.

. A sealing material, such for example, as paraffine or wax ispreferably applied to the sealing surface of either or both of thecontainer and fer to apply the same before forming such portion orportions.

The sealing material has particular advantages when used on thecontainer above described, as it is highly compressed between the bodyof the container and the cover, thus forming practically a 100%efiicient liquid-tight seal. Also on account of the unusually highpressure exerted at the outstanding sealing portion or portions betweenthe container and cover, the lubricating effect of the sealing materialis of pronounced advantage.

The term sealing surface as used in the claims comprehends any surfaceof one container member adapted. to lie opposite a portion of acooperating container member to assist in main taining the joint betweenthe two.

While I have shown and described a present preferred embodiment of theinvention, it is to be distinctly understood that the same is notlimited thereto, but may be otherwise variously embodied and practicedwithin the scope of the following claims.

I claim:

1. A container comprising a cylindrical body of fibrous material and acylindrical cover of fibrous material having telescoping engagement withthe body, the body having a smooth annular surface of uniform width atits rim and with which the cover has a free sliding fit, and a sealingzone comprising a plurality of juxtaposed annular rounded bead-likeparallel ribs embraced by the cover when it is completely closed, thecover and the ribs being in pressure engagement providing a plurality ofannular sealing contacts between the cover and the body and aninterposed sealing air pocket.

2. A container comprising a cylindrical body of fibrous material andacylindrical cover of fibrous material having telescoping engagementwith the body, the body having a smooth annular surface of uniform widthat its rim and with which the cover has a free sliding fit, and asealing zone comprising a plurality of juxtaposed annular parallel ribspressed therein and embraced by the cover, the cover and the ribs beingin pressure engagement providing a plurality of annular sealing andfrictional contacts between the cover and the body.

3. The combination with a fibrous container, of a body member having asealing zone comprising a plurality of juxtaposed annular roundedparallel bead-like 'ribs pressed therein in spaced relation to the rimof the body, and a fibrous cover adapted for telescoping engagement withsaid body, the cover being a relatively loose sliding fit with theunribbed portion of the body above the ribs and a pressure fit with theribbed sealing zone portion thereof providing a plurality of annularsealing contacts between the cover and the body and an interposed sealedair pocket between the ribs.

4. The combination with a fibrous container, of a body member having asealing zone comprising a plurality of juxtaposed annular parallel ribspressed therein, and a fibrous cover adapted for telescoping engagementwith said body, the cover being a pressure fit with the ribs of thesealing zone portion thereof providing a plurality of annular sealingcontacts between the cover and the body and with an interposed sealedair pocket between the ribs.

5. The combination with a fibrous container body member, of a fibrouscover member having telescoping engagement therewith, one of saidbody'and cover members having a sealing zone comprising annular paralleljuxtaposed bead-like ribs pressed therein and adapted to frictionallyengage the other member, such other member having a substantiallyuninterrupted sealing surface adapted for pressure frictional engagementwith said ribs and providing sealing surfaces and a sealing pocketbetween the telescoped parts.

6. The combination with a fibrous container body member, of a fibrouscover member having telescoping engagement therewith, one of said bodyand cover members having continuous parallel juxtaposed bead-likeportions pressed therein providing a fluted sealing zone adapted tofrictionally engage the other member, such other member having asubstantially uninterrupted cylindrical sealing surface adapted forpressure frictional engagement with said sealing zone portion andproviding a plurality of pressure sealing surfaces between thetelescoped parts and an interposed sealed air pocket.

' LEWIS C.. BROOKS.

